Bombshell McGee -- Unleashing the Fuhry

5/6/2010 8:00 AM PDT

Bombshell McGee -- Unleashing the Fuhry

TMZ has obtained footage of a lean, mean BombshellMcGee unloading a series of lightning fast punches in a celebrity boxing training session -- she floats like a butterfly, she stings like a face tattoo.

Bombshell is scheduled to box porn star Gina Lynn on May 7 -- and judging by the footage, taken at Undisputed Downtown gym in San Diego, she's taking the fight very seriously.

We're told Bombshell has been training an hour a day for the past two weeks -- not counting the cardio workouts she gets while working her day job ... which we also have footage of her doing.